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M. M. MORRISON.

MOLDING MACHINE.

7 APPLICATION FILED MAY 23. 1914- Patented Aug. 22, 1916.

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MOLDING MACHINE.

APPLICATION man MAY 23. 1914.

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APPLICATION FILED MAY 23, 1914.

Patented Aug. 22, 1916.

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Invenp-o'm' MAGKINTOSH M. MORRISON, OF CALUMET, MICHIGAN.

MOLDING-MACHINE.

Specification of Letters Patent.

Patented Aug. 22, 1916.

Application filed May 2 3, 1914. Serial No. 840,545.

To all whom it may concern: I

Be it known that I, MAOKINTOSH M. Mon- RISON, a citizen of the UnitedStates, residing at Calumet, in the county ofHoughton I to determine andregulate the force of the jolts or blows; to remove the operatingmechanism out of reach of sand or other abrasives used in such machines;to provide space below the molding table for drawing the patterndownward from a mold and thus utilizing the table as a stripping plateor support for the sand while the mold is on the table; and generally toimprove the con struction and operation of machines of this class.

It consists in the construction, arrange ment and combination of partsas hereinafter particularly described and pointed out in the claims.

In the accompanying drawing like characters designate the same parts inthe several figures.

Figure 1 is a side elevation of a machine embodying the invention; Fig.2 is a plan view and horizontal section on the line 22 Fig. 1; Fig. 3 isa vertical section on the line 33, Figs. 1 and 4; Fig. 4 is a verticalsection on the line H, Fig. 3; Fig. 5 is a front elevation of the oltcounter; Fig. 6 is a side elevation of the counter as viewed from theleft relative to Fig. 5, the pivoted ratchet cover and pawl carrierbeing shown in vertical section on the line 66, Fig. 5; Fig. 7 is avertical section on the line 77, Fig. 5; Fig. 8 is a horizontal sectionon the line 8-8, Fig. 6. Fig. 9 is a detached side view of the tablelifting lever with which the operating connection is made; Fig. 10 is apartial side elevation similar to Fig. 1, showing a differentarrangement of the counter and table lifting rod; Fig. 11 is a viewsimilar to Fig. 3,.showing mod fica ion .Of the pattern carrier for apattern having no adverse draft; and Fig. 12 is a partial side elevationsimilar to Fig. 1 showing a modification of the molding table.

Referring particularly to Figs. 1, 2, 3 and 1, the machine comprises abase 1, and a vertically movable molding or mold jolting table 2,removably mounted and guided thereon. The downward movement of the tableis limited by impact stops 3, consisting of four hardened steel anvilssecured in sockets 4: on the base and fitting at their upper ends freelyin sockets 5 on the under side of the table, thus affording guides forthe table in its vertical movement. In the sockets .5 are inserted andfixed hardened steel impact pieces 6, which normally rest on the anvilsor stops 3, as shown in Fig. 1. The table 2, is connected with the base1, by lifting and dropping mechanism consisting of four bell cranklevers 7 and 8, having vertically and horizontally disposed arms of thesame length. The levers 7 are mounted and fixed on a rocker shaft 9, andtheir vertically disposed arms are connected by horizontal links 10 withthe corresponding arms of the levers 8. The shaft 9 is journaled and supported in bearings 11 on the base below and parallel with one side ofthe table and is provided with an arm 12, which may be formed with oneof the bell crank levers 7, as shown in Figs. 1 and 9. The levers 8 arefulcrumed at their elbows on pins 18, held in alinement with each otherand parallel with the shaft 9, in forked posts 14 on the base 1. Thehorizontally disposed arms of the levers 7 and 8 are connected byvertical links 15 with the table 2, the table being detachably connectedwith the upper ends of these links by pins 16.

A horizontally disposed operating lever 17 fulcrumed in a forked post18, on the base 1, is connected at the end of its shorter arm by a link19 with the arm 12 on the rocker shaft 9. The longer arm of the lever 17normally rests, as shown in Fig. 1, on a rubber or elastic bumper 20,mounted on the base 1, and it is formed on the under side with a seriesof notches or seats 21, 21, 21" and 21', at different distances from itsfulcrum.

An actuating cam 24:, mounted on an overhead driving shaft 25 above thelever 17, is preferably formed as shown in Fig. 1, with a number of armsor projections, in which are mounted equidistant from one another,

rollers 26. An arm or wiper 27, pivoted at 28 to a suitable support andlimited in its downward movement by a stop 29, is adapted to cooperatewith the rollers 26 of the cam 24, for lifting and dropping the table 2,as hereinafter explained. A pendant lifting rod 30, is pivoted at itsupper end to the wiper arm 27, and is provided at its lower end in aforked head 31, with a roller 32, which is movable into and out ofoperative engagement with the lever 17 and into any of the notches orseats 2121 in the under side thereof, at different distances from thefulcrum of the lever so as to vary the lift of the table 2 and the forceof its impact on the anvils or stops 3. The lifting rod 30 is shiftedinto and out of engagement with the lever 17 and into different engagingpositions therewith, by a hand lever 33, mounted on the base 1 adjacentto the table 2, and connected by a rod 34 with the rod 30. To lock andhold the rod 30 in its different positions, the hand lever 33 isprovided with a spring actuated detent 35,

adapted to work with a notched are 36, and

connected with a grip lever 37 fulerumed on the lever 33 adjacent to itshandle. To lift and hold the wiper 27 out of the path. of the camrollers 26, when the j olting mechanism is not in use, the base 1 isformed or provided as shown in Fig. 1, with an inclined guide and rest38, upon which the roller 32 rides when the lifting rod 30 is swung. andlocked by the lever 33 out of operative engagement with the lever 17.

The forked head 31 has a threaded connection with the lower end of therod 30, as shown in Fig. 1, so that it may be adjusted to prevent lostmotion between the lifting rod and the lever 17 when the roller 32 isshifted into engagement with the notch or seat 21 to produce the maximumlift of the table 2.

The arrangement of the guiding and lifting connections between the tableand base as hereinbefore described, provides ample space for drawing thepattern downward from the mold through an opening in the table or thestripping plate with which the table is provided and on which the, moldrests, an expedient which in certain cases facilitates the operations ofmolding. It also avoids the difliculties and objections in.- cident tothe employment of a fluid pressure or other motor underneath the table,where it is subjected to excessive wear on account of exposure to sandor other abrasives falling from the table. The actuating mechanism,consisting of the rotary cam 24 and wiper 27, are in this case locatedoverhead out of reach of sand or other abrasives used in molding. Anynumber of ma chines may be operated independently of one another by camson the same driving shaft 25, the operation of each machine beingcontrolled by shifting the rod 30 into and out of engagement with thelever 17 of that machine.

In molding of the kind in which it is advanta-geous or desirable to drawthe patterns downward from the molds while they rest on the moldingtable 2, the machine is provided with a table which is formed with anopening corresponding in size and shape with the'pattern, and whichserves as a stripping plate, or as shown in Figs. 2, 3 and 4, it may beformed with an opening somewhat larger than the pattern and providedwith, a separate stripping plate or plates 33, countersunk in the top ofa table flush with its upper surface and formed with an openingcorresponding in size and shape with the pattern. The table is alsoprovided with a vertically movable pattern carrier. 39,, guided on ways40, fastened to and depending from the under side of the table and;connected at their lower ends by a yoke or cross piece 41. 7 rier isconnected by links 42 with a crank shaft 43, oiu'naled inv a bearing onthe yoke or cross piece 41. When the pattern 79 has no. adverse draft itmay be bolted or other- V wise immovably fastened to the carrier 39 as.shown in Fig..11,but when it is of such shape that it has adverse draft,or cannot be directly drawn from the mold, it is made in sections andmovably mounted on the carrier as: shown in Figs. 3 and 4.

For the purpose of illustration a pattern for molding the upper part ofa stamp shoe with a dove-tailed projection, is shown. This pattern ismade in two sections 44, which are parted transversely through thedove-tailed projection and are movable horizontallytoward and from eachother. They are formed as shown in Fig. 4, with tongues V 45, which, arefitted and guided in horizontal groovesin oppositesides of the carrier39. The two sections are connected by nuts 46 with right and left screwsmounted on a shaft 47 which is journaled in bearings in the carrier 39parallel with the crank shaft 43, and on which the upper ends of thelinks 42 are pivoted. The outward or opening movement of the sections 44is limited by the engagement of lugs 48 with the table or strippingplate 38, as shownin Fig. 3, and their inward or closing movement islimited by the engagement of the inner ends of the sections with eachother. As shown in Fig. 3, the shafts 43 and 47 are squared at one endto receive a socket wrench.

A flask 49, of suitable form and construction for the pattern and mold,is placed onthe table 2, its position being determined by notches in thebottom of the flask fitting over corresponding tapered studs or lugs 50,projecting from the top of the table, as shown in Figs. 1 and 3.

To indicate the number of jolts to which The pattern car,

each mold is subjected the machine is provided with an automatic counteror inclica-tor comprising a graduated scale, an index movable over thescale, ratchet mechanism for operating the index and means for returningthe index to its initial position when the jolt-ramming mechanism isstopped.

Referring to Figs. 1 and 5 to 8 inclusive, the olt counter is preferablyconstructed as follows: The index or pointer 51 is attached to one endof a shaft or spindle 52, journaled as shown in Fig. 7, in bearings on aframe 53. The frame 53 is secured at one end, as indicated in Fig. 5, toa post or other convenient support. The shaft 52 is pro vided betweenits bearings with a drum 54:, and at the end opposite the index with acrown ratchet wheel 55. Front and back plates 56 and 57 are fastened tothe frame 53 parallel with each other, and on the front plate 56 isformed or mounted a graduated dial or scale 58. A weight 59, issuspended by a flexible band 60 from the drum 5% in such a way that whenthe index is released it will be returned to its initial position atzero on the dial, as shown in Fig. 5. The weight 59 is guided andinclosed with the band 60 in a vertical casing or guideway 61, attachedat its upper end to the frame 53. A ratchet cover or plate 62, is hingedor pivoted at its upper end to the back plate 57, over the ratchet wheel55, and is provided with a vertically movable slide or pawl carrier 63,which is connected, as shown in Fig. 1, by a rod 64, with the wiper arm27. The slide 63 is provided with a pivoted operating pawl 65, adaptedwhen the slide is reciprocated by the vibratory movement of the wiperarm, to engage with and turn the ratchet wheel 55 step by step, andadvance the index 51 an interval on the dial 58 for every up and downmovement of the wiper. The pawl 65 is yieldingly held by a spring 66 inoperative position relative to the slide 63. A holding pawl 67, pivotedto the ratchet cover or plate 62, as shown in Fig. 8, is yieldingly heldby a spring 68 in en gagement with the ratchet wheel 55 to preventbackward movement thereof when the operating pawl 65 is active and theratchet cover or plate is in operative position, as shown in Figs. 6 and7. The ratchet cover or plate 62 is connected at its lower end with asliding rod 69, which is guided in the front and back plates 56 and 57,as shown in Figs. 6 and 7. A spring 70, surrounding this red and bearingat its ends against the back plate 57 and a collar on the rod. tends tohold the ratchet cover or plate in operative position against the backplate The counter is so arranged that the pendant lifting rod 30 whenshifted into inoperative position, as shown in Fig. 1, will move theratchet cover or plate 62 away from the back plate 57, and will carryand hold both pawls 65 and 67 out of engagement with the ratchet wheel55, thereby allowing the weight 59 to return the index 51 to its initialor zero position. The counter may be placed behind the rod 30 as shownin Fig. 10, so that the front end of the rod 69 will be engaged thereby,and the ratchet cover or plate 62 will be shifted with the pawls intoinoperative position when the rod 30 is shifted into inoperativeposition, or the counter may be located in front of the rod 30 and therod 69 connected therewith by a flexible strap 71 or the like, so thatwhen the rod 30 is shifted into inoperative position the ratchet coveror plate 62 with the pawls, will also be shifted into inoperativeposition, as shown in Fig. 1.

To prevent the overwinding of the band 60 on the drum 54: and injury tothe counter mechanism, a trip 72 is pivoted in an opening in the backplate 57, and is located with its lower free end opposite the rim orlower edge of the ratchet cover or plate 62, s shown in Fig. 7. whichprojects into the gnideway 61, is 111 clined, so that when the weight 59is lifted into engagement with the trip it will thrust the ratchet coveror plate away from the back plate 57, and shift the holding pawl 67 outof engagement with the ratchet wheel 55, thereby arresting the advancemovement of the ratchet wheel by the operating pawl 65, even if thetable lifting and jolting mechanism continues in operation.

In the operation of the machine equipped with a separable sectionalpattern for adverse draft such as is used for molding stamp shoes andthe like, and with pattern drawing mechanism as hereinbefore described,the pattern being elevated with the pattern carrier 39 into operativeposition as shown in Figs. 3 and 1-, and the pattern being closed, aflask 19 is placed in position on the table an d filled with moldingsand. The operator throws the hand lever to the right as shown in Fig.1, thereby shifting the pendant lifting rod 30 into operative engagementwith one of the notches 21. 21,

21", 21, in the under side of the lever 17, which may for example, bemade to lift and drop the table 2 tlneeeighths, onehalf, five-eighthsand threefourths of an inch, the lift and drop increasing as the roller32 is shifted toward the fulcrum of 3.

the lever 17. As the roller 32 clears the rest 38 and engages the lever17, the wiper 27 being lowered into the path of the rollers 26 of thecam 24 is lifted and dropped. in rapid succession according to the speedof the cam, say 250 times per minute. The operating lever 17 beingvibrated in unison with the wiper 27 acting through the bell cranklevers 7 and 8 and their connections, lifts and drops the table 2 uponthe The back of the trip,

anvils or impact stops 3, thereby j olting the table and ramming andpacking the sand in the flask above and around the pattern. The extentof the lift and drop of the table, which determines the force of thejolts or blows of the impact pieces 6 on the anvils or stops 3 and thenumber of jolts to which a mold of any given kind is subjected, arevaried according to the character of the work. A low drop repeatedenough times is effective to pack the sand in the flask with approximateuniform density from top to bottom, while a high drop, which is moreexpeditious, packs the sand harder around the pattern, a condition whichshould be avoided, especially in some kinds of work. With each up anddown movement of the wiper 27, the operating pawl 65 of the counteractuated by the rod (34:, turns the ratchet wheel 55 and the index 51forward or clockwise, the distance of a division on the dial or scale58, the ratchet wheel having as many teeth as there are divisions on thedial or circular scale. When the operation of jolt ramming a mold hasbeen c011- tinued long enough, as for example, when the counterindicates 125 jolts, which occurs in thirty seconds after the machine isstarted, if the cam :24: makes 250 revolutions per minute as assumed,the operator throws the lever back to its initial position at the left,as shown in Fig. 1, the detent or latch 35 dropping into the singlenotch at the left in the are 36 and locking the lifting rod 30 and thewiper 9.7 in inoperative position with the roller 32 on the rest 38. Theoperation of the table lifting and dropping mechanism is thus arrested,the table resting in its lower position with the impact pieces 6 on theanvils or stops 3. As the rod 30 is turned back to its initial positionby the operator, it swings the ratchet cover or plate 62 away from theback plate 57 of the counter, carrying both pawls 65 and 67 out ofengagement with the ratchet wheel 5.) and releasing the index 51, whichis returned to its initial zero position, as shown in Fig. 5 by theweight 59. The pattern is then spread or opened by separating thesections let toenlarge the imprint of the dovetailed projection in thesand, so that when the pattern is closed or the sections 4 1 broughttogether, the pattern may be drawn downward from the mold on the table2. To accomplish this, a socket wrench is applied to the squared end ofthe shaft 47 through openings made therefor in the flanges of the table,as shown in Fig. 3, and the shaft isfirst turned in a direction toseparate the sections 44, the opening movewith the wrench, and thepattern is thus drawn downward from the mold through the opening in thetable. The flask is now removed from the table and assembled with a castiron chiller for pouring or filling the mold and casting a stamp shoewith the lower portion thereof hardened. After the mold has beenremoved, the pattern, which is left closed, is elevated with the carrier39 into operative position above the table by turning the crank shaft 43back to its original position, as shown in Figs. 3 and 4. Another flaskis placed in position on the table, filled with sand and jolt-rammed asabove explained.

In molding with a pattern which has no adverse draft and. which isimmovably attached to the carrier 39, after the jolt-ramming operationhas been completed, the pattern is drawn downward directly from the moldby turning the crank shaft 43, as above explained. For this kind ofmolding the nuts 46 and the right and left screws with which they work,may be omitted as shown in Fig. 11. lVith a plain table 2 having noopening therein, which as shown in Fig. 12 may be readily substitutedfor a table like that shown in Figs. 2, 3, 4 and 11, the flask withpattern, after it has been jolt-rammed with sand, is removed from thetable and turned upside down to remove the pattern.

Various changes in the details of construction and arrangement of partsof the machine other than those specifically shown and described may bemade without departure from the principle and scope of the invention asdefined in the following claims.

I claim:

1. In a molding machine thecombination of a base, a vertically movablemolding table mounted and guided thereon, interconnected lifting leversconnecting said table and base, and an overhead drive shaft havinganractuating adjustable connection for vibrating said levers andsuccessively lifting and dropping said table.

-2 In a molding machine the combination of a base, a vertically movablemolding table mounted thereon, bell-crank levers connecti'ng said baseand table, an operating lever connected with said bell-crank levers, anoverhead shaft provided with a cam, and a wiper arranged to cooperatewith the cam and having a connection with the operating lever adapted tosuccessively lift the table.

3. In a molding machine the combination of a vertically movable moldingtable, interconnected lifting levers connected with said table, impactstops arranged to limit the downward movement of the table, and anoverhead driving cam having a detachable connection with said levers andadapted to successively lift the table and permit it to drop on saidstops.

4.. In a molding machine the combination It jolts.

5. In a molding machine the combination of vertically movable moldingtable, lifting mechanism connected with said table, impact stops forlimiting the downward movement of the table and imparting jolts thereto,an operating lever connected with he lifting mechanism, an overheaddrive shaft provided with a cam, a wiper arranged to cooperate with thecam, and a pendant rod connected with the wiper and movable into and outof operative engagement with said ope *ating lever.

6. In a molding machine the combination of a vertically movable moldingtable, impact stops for limiting the downward movement of the table withjolts, lifting mechanism connected with said table and comprising alever, an actuating cam, a wiper arranged to cooperate with said cam,and a rod connected with said wiper and movable to engage said lever atdifferent distances from its fulcrum for varying the lift of the table.

7. In a-molding machine the combination of a vertically movable moldingtable, impact stops for abruptly limiting the clownward movement of thetable, lifting mechanism connected with the table and comprising alever, an actuating cam, a wiper arranged to cooperate with the cam, arod connected with said wiper and movable into and out of operativeengagement with said lever and into engaging positions at differentdistances from its fulcrum, and means for shifting said rod and holdingit in its different positions.

8. In a molding machine the combination of a vertically movable moldingtable, impact stops for limiting the downward movement of the table witha jolt, lifting mechanism connected with the table and comprising alever, an actuating cam above said lever, a vertically movable wiperadapted to cooperate with the cam, a rod pivotally connected at itsupper end with the wiper and movable at its lower end into and out ofoperative engagement with said lever, and a rest adapted by engagementwith said rod when it is shifted out of engagement with the lever, tolift and hold the wiper out of operative relation to the cam.

9. In a molding machine the combination of a vertically movable table,impact stops for limiting the downward movement of the table, liftingmechanism connected with the table and comprising an operating lever, an

actuating cam, a wiper adapted to cooperate with the cam for lifting thetable, a rod pivotally connected with the wiper and movable into and outof operative engagement with said lever and into different engagingpositions, a hand lever connected with said rod for shifting it intodifferent positions, means for locking the hand lever in differentpositions, and an inclined guide rest adapted by engagement with saidrod when it is shifted to inoperative position to lift and hold thewiper out of the path of the cam.

10. In a molding machine the combina tion of a base, a verticallymovable table, impact stops for limiting the downward movement of thetable fixed to one of the parts and freely fitting guide ways in theother, bell crank levers fulcrumed at their elbows on the base, linksconnecting the horizontally disposed arms. of said levers with thetable, links connecting the vertically disposed arms of said levers inpairs, and means for rocking said levers to lift and drop the table.

11. In a molding machine the combination of a base, a vertically movabletable, impact stops for limiting the downward move ment of the table,bell crank levers mounted on the base and having vertically andhorizontally disposed arms, two of said levers being fixed on andconnected by a rocker shaft which is provided with an arm, linksconnecting the vertically disposed arms of the levers on the rockershaft with the corresponding arms of the other levers, links connectingthe table with the horizontally disposed arms of said levers, ahorizontally disposed and vertically movable operating lever connectedwith the arm on the rocker shaft, a cam, a wiper arranged to cooperatewith the cam for lifting and dropping the table, a rod pivotallyconnected with the wiper and movable to engage with the operating leverat different distances from its fulcrum, and means for shifting said rodinto its different positions.

12. In a molding machine the combination with jolting mechanism andmeans for starting and stopping said mechanism at will, of a joltindicator comprising a movable part having an actuating connection witha reciprocating part of the jolting mechanism, means tending to returnsaid movable part of the indicator to its initial position, and meansoperated by said starting and stopping means adapted to release saidmovable part of the indicator and permit it to return to its startingposition whenever the jolting mechanism is stopped.

13. In a molding machine the combination of a vertically movable moldjolting table having an opening therein and provided with a verticallymovable pattern carrier guided therein, lifting mechanism connected withthe table, means for raising and lowering said carrier relatively to thetable, pattern sections guided on said carrier and movable toward andfrom each other, and means for opening and closing the pattern while itis in a mold.

14. In a molding machine the combination of a vertically movable table,having an opening therein and provided with a vertically movable patterncarrier guided in the table, a crank shaft journaled in a bearingsuspended from the table and connected by links with the patterncarrier, and lifting mechanism connected with the table.

15. In a molding machine the combination of a vertically movable tablehaving an opening therein, lifting mechanism connected with the table, avertically movable pattern carrier guided on ways extending downwardlyfrom the table, pattern sections guided on the pattern carrier andmovable horizontally toward and from each other, a shaft journaled inthe pattern carrier and provided with right and left screw threads, andnuts engaging said threads and connected with the pattern sections foropening and closing the pattern.

In Witness whereof I hereto affix my signature in presence of twowitnesses.

MACKINTOSI'I M. MORRISON. l/Vitnesses: V

I-IENRY HAsrnn, ALBERT E. HOOPER.

Copiesof this patent may lie-obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

